chore: import upstream snapshot with attribution

2026-07-13 12:10:27 +08:00
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+# tasks
+
+Task-augmented execution: a requestor augments a `tools/call` with a `task`, the
+receiver returns a `CreateTaskResult` immediately, and the requestor polls
+`tasks/get` and retrieves the deferred result.
+
+**Status: deferred.** Tasks ship in 2026-07-28 as
+[SEP-2663](https://github.com/modelcontextprotocol/modelcontextprotocol/blob/main/docs/seps/2663-tasks-extension.md),
+an `io.modelcontextprotocol/tasks` extension that is wire-incompatible with the
+2025-11-25 in-core design still carried (types-only) in `mcp_types`. The runtime
+needs to be built to the SEP — server-decided augmentation (ignoring the legacy
+`params.task`), the `{tasks/get, tasks/update, tasks/cancel}` method set, the
+`resultType: "task"` envelope, `execution.taskSupport` gating, and `ttlMs`
+fields — so it lands in a separate PR with the conformance `tasks-*` scenarios
+wired in.
+
+## Spec
+
+[SEP-2663 — Tasks extension](https://github.com/modelcontextprotocol/modelcontextprotocol/blob/main/docs/seps/2663-tasks-extension.md)
+· [SEP-2133 — extensions capability](https://github.com/modelcontextprotocol/modelcontextprotocol/issues/2133)
+
+## See also
+
+`apps/` (the additive half of the extension API).